© 2021 Birlesik Dunya Yenilik Arastirma ve Yayincilik Merkezi. All rights reserved.As a result of increasing COVID-19 cases all over the world, schools continued to provide education distantly since the beginning of 2020. This immediate shift is considered as both a factor of anxiety and an area of anxiety. This study aims to investigate the underlying reasons of anxieties among secondary school students with regard to five dimensions: health-related issues, technological opportunities, domiciliary conditions, course-related issues and privacy-related issues. A survey design was adopted. The research was carried out with participation of 156 secondary school students of a state school in Istanbul. Data was collected through the Anxiety Sources Questionnaire in Distance Education developed by the researchers. The underlying reasons of anxiety of secondary school students is presented under five categories. The results revealed that students were mainly concerned about face-to-face exams; problems related to devices; isolation; their inefficiency to learn the content and sharing their private settings.